Process for dyeing or lightening keratin fibres in two parts, using an oil-rich alkaline direct emulsion based on a solid nonionic surfactant with an HLB ranging from 1.5 to 10

Abstract

The present invention relates to a process for dyeing or lightening keratin fibres, comprising the step of extemporaneously mixing at the time of use two compositions (A) and (B) and of applying the said mixture to the said fibres; the said mixture comprising at least 25% by weight of fatty substances relative to the total weight of the composition obtained from the mixing of two compositions (A)+(B); with: —(A) representing a composition in direct emulsion form whose content of oil(s) ii) is at least 30% by weight relative to the weight of composition (A), and comprising: i) at least one nonionic surfactant that is solid at room temperature and at atmospheric pressure, with an HLB ranging from 1.5 to 10; ii) at least one basifying agent; Hi) optionally at least one additional surfactant other than the solid nonionic surfactants (i), iv) optionally at least one dye; and—(B) representing a composition comprising at least one chemical oxidizing agent. A subject of the present invention is also a multi-compartment device and a composition (A) in direct emulsion form and the ready-to-use composition resulting from the mixing of compositions (A) and (B). The process according to the invention makes it possible to dye keratin fibres in a powerful, intense and/or homogeneous manner while at the same time being easy to prepare and to apply, since the mixture in the form of an oil-rich emulsion does not run, but remains localized at the point of application. The process of the invention also makes it possible to lighten keratin fibres in a noteworthy manner.

The invention claimed is: 
     
       1. A composition comprising:
 a composition (A) in direct emulsion form comprising:
 at least one first nonionic surfactant having an HLB ranging from about 1.5 to 7.6, which is solid at room temperature and at atmospheric pressure; 
 at least one basifying agent; 
 at least one second nonionic surfactant having an HLB of greater than about 10; 
 optionally at least one dye; and 
 at least about 30% by weight of at least one oil; and 
 
 a composition (B) comprising at least one oxidizing agent and at least one oil different from a fatty alcohol, 
 wherein the at least one first nonionic surfactant is chosen from oxyalkylenated and glycerolated nonionic surfactants. 
 
     
     
       2. The composition according to  claim 1 , wherein the at least one oil of composition (A) is present in an amount of at least about 50% by weight, relative to the total weight of composition (A). 
     
     
       3. The composition according to  claim 1 , wherein the at least one first nonionic surfactant is chosen from:
 oxyalkylenated (C 8 -C 24 )alkylphenols; 
 saturated and unsaturated, linear and branched, oxyalkylenated C 8 -C 30  alcohols; 
 saturated and unsaturated, linear and branched, optionally oxyalkylenated C 8 -C 30  amides; 
 optionally polyoxyethylenated esters of saturated and unsaturated, linear and branched C 8 -C 30  acids and of sorbitol; 
 polyglycerolated esters of saturated and unsaturated, linear and branched C 8 -C 30  acids; 
 saturated and unsaturated oxyethylenated plant oils; and 
 oxyethylenated and oxypropylenated silicones. 
 
     
     
       4. The composition according to  claim 1 , wherein the at least one first nonionic surfactant is chosen from mono- and polyoxyalkylenated nonionic surfactants. 
     
     
       5. The composition according to  claim 4 , wherein the mono- and polyoxyalkylenated nonionic surfactants comprise oxyalkylene units are chosen from oxyethylene and oxypropylene units. 
     
     
       6. The composition according to  claim 1 , wherein the at least one first nonionic surfactant is chosen from solid nonionic surfactants having an HLB ranging from about 2.5 to 7.1. 
     
     
       7. The composition according to  claim 1 , wherein the at least one first nonionic surfactant is present in an amount ranging from about 0.1% to about 30% by weight, relative to the total weight of the composition (A). 
     
     
       8. The composition according  claim 1 , wherein the at least one oil of composition A is chosen from C 6 -C 16  lower alkanes; non-silicone oils of animal origin; glycerides of plant and synthetic origin; linear and branched hydrocarbons of mineral and synthetic origin comprising more than 16 carbon atoms; fluoro oils; liquid fatty alcohols; liquid fatty esters; non-salified liquid fatty acids; silicone oils; and mixtures thereof. 
     
     
       9. The composition according to  claim 1 , wherein the at least one oil of composition A is chosen from isododecane and mineral oils. 
     
     
       10. The composition according to  claim 1 , wherein the at least one basifying agent is chosen from aqueous ammonia, alkali metal carbonates and bicarbonates, sodium hydroxide and potassium hydroxide. 
     
     
       11. The composition according to  claim 1 , wherein the at least one basifying agent is chosen from organic amines. 
     
     
       12. The composition according to  claim 1 , wherein the at least one dye is chosen from oxidation dyes, direct dyes, and mixtures thereof. 
     
     
       13. The composition according to  claim 1 , wherein the at least one dye is an oxidation dye chosen from oxidation bases and the addition salts thereof, optionally combined with at least one coupler chosen from meta-phenylenediamines, meta-aminophenols, meta-diphenols, naphthalene-based couplers, heterocyclic couplers, and the addition salts thereof. 
     
     
       14. The composition according to  claim 1 , wherein composition (A) does not contain an oxidation base, coupler, or direct dye. 
     
     
       15. The composition according to  claim 1 , wherein the at least one oxidizing agent is chosen from hydrogen peroxide, urea peroxide, alkali metal bromates and ferricyanides, peroxygenated salts, peracids, and precursors thereof. 
     
     
       16. A ready-to-use composition in direct emulsion form resulting from mixing composition (A) according to  claim 1  and a composition (B) comprising at least one chemical oxidizing agent. 
     
     
       17. The composition according to  claim 1 , wherein composition (B) further comprises at least one fatty alcohol.